Forms

 

ASP provides the Request.QueryString and Request.Form objects to collect input entered by users in HTML forms.

 

Form using method="get"

This demonstrates how to interact with user input using the Request.QueryString object.

Form using method="post"

This shows how to handle user input using the Request.Form object.

Form with Radio Buttons

This example explains how to retrieve selected radio button values using Request.Form.

 

The Request object is used to gather information submitted by users through forms.

User input can be accessed using:

Request.QueryString

Request.Form

The method used depends on whether the form is submitted using GET or POST.

 

The Request.QueryString object retrieves form values submitted using the GET method.

Data sent using GET is visible in the browser’s address bar

There is a limit on the amount of data that can be sent

Example HTML Form (GET):

 

First Name:
Last Name:

If the user enters Bill and Gates, the URL sent to the server will be:

 

https://www.w3schools.com/simpleform.asp?fname=Bill&lname=Gates

ASP Code (simpleform.asp):

 

Welcome <% Response.Write(Request.QueryString("fname")) Response.Write(" " & Request.QueryString("lname")) %>

Output:

 

Welcome Bill Gates

 

The Request.Form object is used to retrieve values submitted using the POST method.

POST data is not visible in the browser address bar

There is no limit on the amount of data sent

Example HTML Form (POST):

 

First Name:
Last Name:

If the user submits the form, the URL will look like this:

 

https://www.w3schools.com/simpleform.asp

ASP Code (simpleform.asp):

 

Welcome <% Response.Write(Request.Form("fname")) Response.Write(" " & Request.Form("lname")) %>

Output:

 

Welcome Bill Gates

 

User input should be validated on the client side whenever possible using browser-based scripts. This improves performance and reduces server load.

However, server-side validation is important when:

Data is stored in a database

Security is a concern

A good server-side validation technique is to post the form to the same page, so any error messages can be displayed alongside the form. This makes errors easier for users to identify and correct.